It sounds like the buttons but he did press it in so I don't know. Weird. I don't think it will be a default nd could break the controller but it does make the controller seem cheaper than it should be

I didnt know that we have to shake the pad like that when gaming!I Never did that kind of destroying shake with any gamepad on any game,its not natural unless people want to destroy the pad!The pad is not to be used or shake like a par of maracas !

It's gotta be the ABXY buttons. They sit on top of a circuit board underneath. When you press the button, it engages the actual button underneath on the board. But they just sit on top of one another, so there is a little movement to be had. I am sure that is what the rattle is.

The new game pad can also be used as a wii mote in a sense where you can move it around. There is most likely some sort of tracking ball inside that detects which direction you tilt the game pad. (also known as a Gyrosensor)